ECS Data Engineer Interview Questions
The questions to prepare for a ECS Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Compare batch and streaming data processing, including when each fits best in a pipeline.
ECSDesign and implement SCD Type 1 and Type 2 dimensions with history tracking, idempotent loads, and data quality controls.
ECSHow to choose between row-oriented and column-oriented formats across different stages of a data pipeline.
ECSApproach for stabilizing an automated workflow that is failing broadly, with focus on orchestration, data quality, idempotency, and rollback.
ECSApproach for adding data quality checks, observability, and production monitoring to a data pipeline.
ECSApproach for managing data pipeline infrastructure as code, including orchestration, drift control, and operational monitoring.
ECSExplain why monitoring matters in pipeline operations and which tools you would use for visibility, alerts, and data quality checks.
ECSCalculate the longest consecutive login streak for each user using window functions and date manipulations.
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Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreCompute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.
ADP